Spin fluctuations in hydrogen-stabilized Laves phase UTi2H5

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10398895" target="_blank" >RIV/00216208:11320/19:10398895 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=csRfvK7fxv" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=csRfvK7fxv</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/14786435.2019.1605222" target="_blank" >10.1080/14786435.2019.1605222</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Spin fluctuations in hydrogen-stabilized Laves phase UTi2H5

Popis výsledku v původním jazyce

Uranium Laves phase UTi2 does not exist in a pure form, but can be stabilised by the presence of hydrogen, which can be absorbed in concentration exceeding 5 H atoms/f.u. Low temperature specific heat, magnetic susceptibility, and resistivity indicate that UTi2H5 is a spin fluctuator close to the verge of magnetic ordering. Its susceptibility follows at high temperatures the Curie-Weiss law with U effective moment mu(eff[) = 3.1 mu(B)/U and paramagnetic Curie temperature Theta(p) = -200 K. The temperature dependence of specific heat exhibits a pronounced and weakly field dependent upturn in C-p/T versus T below 10 K reflecting the effect of spin fluctuations. It can be described by an additional T-1/2 term. The Sommerfeld coefficient gamma = 256 mJ/mol K-2 classifies the compound as a mid-weight heavy fermion. Spin fluctuations are affecting also electrical and thermal transport and thermoelectric power, which all resemble UAl2. A lattice anomaly at approximate to 240 K, attributed to the melting of hydrogen sublattice, reflects in most of bulk properties.

Název v anglickém jazyce

Spin fluctuations in hydrogen-stabilized Laves phase UTi2H5

Popis výsledku anglicky

Uranium Laves phase UTi2 does not exist in a pure form, but can be stabilised by the presence of hydrogen, which can be absorbed in concentration exceeding 5 H atoms/f.u. Low temperature specific heat, magnetic susceptibility, and resistivity indicate that UTi2H5 is a spin fluctuator close to the verge of magnetic ordering. Its susceptibility follows at high temperatures the Curie-Weiss law with U effective moment mu(eff[) = 3.1 mu(B)/U and paramagnetic Curie temperature Theta(p) = -200 K. The temperature dependence of specific heat exhibits a pronounced and weakly field dependent upturn in C-p/T versus T below 10 K reflecting the effect of spin fluctuations. It can be described by an additional T-1/2 term. The Sommerfeld coefficient gamma = 256 mJ/mol K-2 classifies the compound as a mid-weight heavy fermion. Spin fluctuations are affecting also electrical and thermal transport and thermoelectric power, which all resemble UAl2. A lattice anomaly at approximate to 240 K, attributed to the melting of hydrogen sublattice, reflects in most of bulk properties.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Philosophical Magazine

ISSN

1478-6435

e-ISSN

—

Svazek periodika

99

Číslo periodika v rámci svazku

15

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

18

Strana od-do

—

Kód UT WoS článku

000470441200001

EID výsledku v databázi Scopus

2-s2.0-85065086363